f(x)=(n-7)(n+4)

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Solution for f(x)=(n-7)(n+4) equation: 


Simplifying
f(x) = (n + -7)(n + 4)

Multiply f * x
fx = (n + -7)(n + 4)

Reorder the terms:
fx = (-7 + n)(n + 4)

Reorder the terms:
fx = (-7 + n)(4 + n)

Multiply (-7 + n) * (4 + n)
fx = (-7(4 + n) + n(4 + n))
fx = ((4 * -7 + n * -7) + n(4 + n))
fx = ((-28 + -7n) + n(4 + n))
fx = (-28 + -7n + (4 * n + n * n))
fx = (-28 + -7n + (4n + n2))

Combine like terms: -7n + 4n = -3n
fx = (-28 + -3n + n2)

Solving
fx = -28 + -3n + n2

Solving for variable 'f'.

Move all terms containing f to the left, all other terms to the right.

Divide each side by 'x'.
f = -28x-1 + -3nx-1 + n2x-1

Simplifying
f = -28x-1 + -3nx-1 + n2x-1

Reorder the terms:
f = -3nx-1 + n2x-1 + -28x-1

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